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strength reduce exp2 into ldexp, rdar://5852514

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50586 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2008-05-02 18:43:35 +00:00
parent 4446997e0a
commit e818f770bb
2 changed files with 90 additions and 1 deletions
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test/Transforms/SimplifyLibCalls/exp2.ll
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; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | grep {call.*ldexp} | count 4
; rdar://5852514
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin8"
define double @t1(i32 %x) nounwind {
entry:
%tmp12 = sitofp i32 %x to double ; <double> [#uses=1]
%exp2 = tail call double @exp2( double %tmp12 ) ; <double> [#uses=1]
ret double %exp2
}
define float @t4(i8 zeroext %x) nounwind {
entry:
%tmp12 = uitofp i8 %x to float ; <float> [#uses=1]
%tmp3 = tail call float @exp2f( float %tmp12 ) nounwind readonly ; <float> [#uses=1]
ret float %tmp3
}
declare float @exp2f(float) nounwind readonly
define double @t3(i16 zeroext %x) nounwind {
entry:
%tmp12 = uitofp i16 %x to double ; <double> [#uses=1]
%exp2 = tail call double @exp2( double %tmp12 ) ; <double> [#uses=1]
ret double %exp2
}
define double @t2(i16 signext %x) nounwind {
entry:
%tmp12 = sitofp i16 %x to double ; <double> [#uses=1]
%exp2 = tail call double @exp2( double %tmp12 ) ; <double> [#uses=1]
ret double %exp2
}
declare double @exp2(double)